Switch statement with strings?

I'm working on a small homework assignment and I'm supposed to make a food menu. Anyways, my switch isn't working. I'm trying to use a simple function that I can pass a value of "fish", "drink", or "chips" to and then it will output:

"Are you ordering FISH?" (or chips/drink)

I can't get the switch to work, it's supposed to detect what I pass into it and then output a printf based on the switch case.